Update to new agent schema (#35578)

Release Notes:

- N/A

---------

Co-authored-by: Agus Zubiaga <agus@zed.dev>

crates/acp_thread/src/connection.rs

@@ -1,6 +1,6 @@
-use std::{path::Path, rc::Rc};
+use std::{error::Error, fmt, path::Path, rc::Rc};
 
-use agent_client_protocol as acp;
+use agent_client_protocol::{self as acp};
 use anyhow::Result;
 use gpui::{AsyncApp, Entity, Task};
 use project::Project;
@@ -9,8 +9,6 @@ use ui::App;
 use crate::AcpThread;
 
 pub trait AgentConnection {
-    fn name(&self) -> &'static str;
-
     fn new_thread(
         self: Rc<Self>,
         project: Entity<Project>,
@@ -18,9 +16,21 @@ pub trait AgentConnection {
         cx: &mut AsyncApp,
     ) -> Task<Result<Entity<AcpThread>>>;
 
-    fn authenticate(&self, cx: &mut App) -> Task<Result<()>>;
+    fn auth_methods(&self) -> &[acp::AuthMethod];
 
-    fn prompt(&self, params: acp::PromptArguments, cx: &mut App) -> Task<Result<()>>;
+    fn authenticate(&self, method: acp::AuthMethodId, cx: &mut App) -> Task<Result<()>>;
+
+    fn prompt(&self, params: acp::PromptRequest, cx: &mut App) -> Task<Result<()>>;
 
     fn cancel(&self, session_id: &acp::SessionId, cx: &mut App);
 }
+
+#[derive(Debug)]
+pub struct AuthRequired;
+
+impl Error for AuthRequired {}
+impl fmt::Display for AuthRequired {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "AuthRequired")
+    }
+}